Item Floor Mount Vibration Isolator, Isolator Type Neoprene, Capacity Range 2150 to 4300 lb, Deflection 0.25 in to 0.50 in, Height 2 3/4 in, Width 4 3/8 in, Color Mark Yellow, Cap Screw Dia. and Length 1/2 x 1 in, Includes Top Bolts and Washers, Dimension T 5/16 in, Dimension MBD 1/2 in